3 Answers
3

Try wrapping both <fieldset>s in a single container <div> that isn't fixed height -- it will neatly enclose blah2, and will grow up to the max size of your <div> parent. Set blah1's height to be 100% of the containing <div>.

I was able to get it working by adding padding-bottom to the fieldset for Chrome only. This balances out some of the extra height %. It's nice in that it works (relatively consistently) even when resizing.